I have a question for you. Lets say x = 70, y = 140, will D be the center of the center of circle passing through A, B & C? Think!
Attachment:
OG-DS-140.png
In the figure above, what is the value of x + y ?
(1) x = 70
(2) ΔABC and ΔADC are both isosceles triangles.
I thought the answer is A
here is my reasoning
From 1.From the Figure As per triangles property when x=70 then Y=140, i.e Inscribed angle = twice the central angle...But In the Answer it says Y can vary.....
From 2. as we don't have any sides or angles we can't get anything from here
So I thought the answer is A..But surprisingly the answer is E.......
Can anyone please explain,How is it so.....
Thanks in advance